Materials Literature
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Temperature dependent photoluminescence and cathodoluminescence (CL) spectroscopies are employed to investigate free exciton (FX) emissions in ZnO tetrapods. The intensity of the no-phonon line is found to be largely suppressed as compared with longitudinal optical phonon assisted transitions, in sharp contrast to bul…
Abstract Measurements of conductivity as a function of temperature were performed on a large number of memory cells of a GeSbTe phase change memory alloy, in both the set and reset states. Conductivity obeys the Meyer–Neldel rule in both states, with the same Meyer–Neldel, or isokinetic, temperature, but with conducti…
Abstract Insight into the unique structure of layered double hydroxides has been obtained using a combination of X‐ray diffraction and Raman spectroscopy. Indium‐containing hydrotalcites of formula Mg 4 In 2 (CO 3 )(OH) 12 · 4H 2 O [2:1 In‐LDH (layered double hydroxides)] through to Mg 8 In 2 (CO 3 )(OH) 18 · 4H 2 O (…
Silver octopod plasmonic nanoparticles have been recently synthesized with a variety of shapes. In the present letter, we demonstrate their versatile optical response using the discrete dipole approximation. There are three major resonances that can be tuned up to a large extent making them especially attractive to us…
Abstract One of the most challenging issues remaining in the design and the synthesis of robust nanostructured polymers blends is incorporating long crystallizable chains while preserving the co‐continuity of the phases. Here, we demonstrate that by reactive blending of functionalized polyolefin and polyamides such co…
Abstract The synthesis of silver nanoparticles attached on the surface of a hollow cornet‐like polymer matrix which served as a reductant and host matrix is described. This hybrid organic/inorganic macromolecular matrix is exhibiting anion‐exchange properties, porous structure and hollow morphologies, and absorptions…
We present a method to bond directly silicon and diamond plates to obtain a single silicon-on-diamond material, with a carbon–silicon interface of unprecedented quality. The bonding is performed at room temperature, via picosecond 355 nm pulsed laser irradiation of the silicon-diamond interface, through the transparen…
Abstract Self‐similar Sierpinski carpet fractals were fabricated using a new nanopatterning technique, i.e. solid‐state superionic stamping (S4), to study the effect of feature size on plasmon‐enhanced Raman scattering. A real‐time Raman image showing electromagnetic (EM) field enhancement contrast is demonstrated. Th…
Abstract Polarized micro‐Raman spectroscopy was carried out on the (001) face of a 0.67PbMg 1/3 Nb 2/3 O 3 ‐33%PbTiO 3 (PMN‐33%PT) single crystal. The Raman images revealed the spatial variations of the intensity of the Raman bands, suggesting that the structure in the PMN‐33%PT single crystal varied from one micro‐ar…
This paper presents measurements and models for how the macroscopic curvature of microstructured polymers affects hydrophobicity. Flexible polymer substrates were fabricated with arrays of regular microstructures. The interaction of liquid drops with these surfaces was analyzed for flat substrates and substrates flexe…
Schwarzes AgSO4, das erstmals durch eine Austauschreaktion synthetisiert wurde, unterscheidet sich erheblich von den wasserfreien Sulfaten anderer Elemente der Gruppe 11: Es hat eine sehr schmale elektronische Bandlücke (ca. 0.2 eV) und eine außergewöhnlich starke eindimensionale antiferromagnetische Ordnung (J≈10 meV…
Abstract Heterogeneous (on‐glass) protein crystal nucleation was separated from the bulk one in systems of thin protein solution layers, confined between two glass plates of custom made quasi two‐dimensional all‐glass cells, as well as by applying forced protein solution flow. Two commercial samples of hen‐egg‐white l…
Abstract Surface‐enhanced Raman scattering (SERS) spectra of Ag@polypyrrole (PPy) nanoparticles with both 488 and 1064 nm excitation were investigated. Experimental results as well as theoretical analysis demonstrated that electromagnetic (EM) enhancement and charge transfer (CT) both rebounded to the SERS effect of A…
The composition of the studied ash was confirmed by elemental analysis, IR, XRD spectra, and thermal data (TG &DTA). These analyses were used to determine thermodynamic parameters such as the activation energy (?Ea), enthalpychange (?H*), entropy change (?S*) and free energy change (?G*) related to the thermal decompo…
Multifunctional transparent ferroelectric ceramics have widespread applications in electro-optical devices. Unfortunately, almost all currently used electro-optical ceramics contain a high lead concentration. In this work, via coupling of spark plasma sintering with high pressure, we have successfully synthesized bulk…
Pb ( Zr x Ti 1 − x ) O 3 [PZT] thin films of thickness 2.0 μm were fabricated on silicon substrates (111)Pt/Ti/SiO2/Si using a sol-gel spin-coating technique. PZT films on substrates with a strontium titanate bottom layer are preferentially {110}-oriented with a columnar structure. The PZT films exhibit good dielectri…
The electronic surface structure of Mo incorporated WO3 WO3 Mo is investigated using direct and inverse photoemission and compared to that of pure Mo free WO3. The films are found to be n type with an electronic surface band gap of 3.27 0.15 eV. The conduction band minimum valence band maximum is 0.64 0.10 eV above [2…
The one-pot fabrication of various silver nanostructures on substrates is achieved through electron beam irradiation of the surface of silver dodecanethiolate (Ag(I)- SC(12)). The Ag(I)-SC(12) films are simply prepared by spin-coating silver salt and dodecanethiol solution. Various silver nanostructures such as partic…
Abstract In Dy 3+ and Li + codoped ZnO nanowires, the additives accumulate preferentially in {0001} planes, resulting in serious breakdown of the translational symmetry in ab plane and modification of the phonon oscillation field. Not only acoustic overtones, silent optical modes, surface optical (SO) phonon modes, an…
We report on transport properties of oxide manganite La0.7Ba0.3MnO3−δ (LBMO) thin films deposited by pulsed laser deposition (PLD) technique. Detailed analysis of heavy-ion stoichiometric composition has been carried out as a function of laser-pulse fluence and ambient oxygen pressure. Depositions using high-fluence (…